Packaging of edible oils



Patented Aug. '29, 1933 PACKAGING or EDIBLE onus Walter G. Christiansen, Bloomfield, and Francis R. Chappell, Passaic, N, J.,-'assignors to E. R. Squibb & Sons., New York, N. Y., a corporation of New York No Drawing.

Application January 17, 1930 Serial No. 421,590

, 4 Claims. 'This invention relates to the packaging of edible oils, particularly cod-liver oil, to prevent them from acquiring vmalfiavon. As employed herein, the term edible oils embraces oils used 5 for alimentary and therapeutic purposes, for' example cod-liver oil and castor oil; and "malflavor designates an offensive or objectionable taste and/or odor. v

Certain edible oils, notably cod-liver oiland o castor oil, are of considerable alimentary and therapeutic value, but tend, even if they have been treated for the removal of malflavor, to acquire in a relatively short while a malflavor that militates strongly against and unduly restricts their use.

- It is the object of this invention to provide',a

package and a method of packaging whereby edible oils, especially cod-liver oil and castor oil,

may be prevented from acquiring malflavor.

the primary agents for causing edible oils to acquire malflavor, and that the oils may be satisfactorily protected from the action of these agents by packaging in opaque containers interiorly coated with an oil-insoluble filmcontaining an antioxidant. An oil-insoluble film may be formed by the dryingof various lacquers and varnishes and other fluids; for example, phenolformaldehyde condensate lacquer or solutions of pyroxylin, cellulose acetate, or gelatin. f

Opaque is herein used in the sense offrela- .tively impervious to actinic rays; and by "an opaque container we mean a container (1) formed of an opaque material or (2) coated interiorly with an oil-insoluble film containing an opaque substance, or exteriorly, if the opaque sub-- tainers in the second division; for example, the

dyes Congo red and ponceau 2RD. Protection may, of course, be augmented by concurrently employin' both expedients; that'is, not only formingthe containers of an opaque material but T also coating them interiorly or exteriorly with an oil-insoluble film containing an opaque substance. 5 1

Compounds in the class-consisting of phenols,

We have found that oxygen and light are among thereon after some bottle.

amine, are 'efiicient antioxidants for our purpose. As an instance of the practice of our invention, we may introduce into an amber glass bottle a phenol-formaldehyde condensate lacquer containing between 2% and 3% of hydroquinone, shake the bottle until its entire interior has been covered, and drain out the excess of lacquer; apply with a brush to the exterior of the bottle a phenol-formaldehyde condensate lacquer containing about .0 5% of Congo red; and dry the bottle, preferably by baking. There remains on the inner surface of the bottle a film of phenolformaldehyde condensate containing the hydroquinone, and on its outer surface a filmof phenolformaldehyde condensate containing the Congo red. Filling of.the bottle with cod-liver oil, and sealing, may be performed in the customary manner. By reason of the opacity of the amber glass and of the Congo dye and the antioxidant properties of the hydroquinone, the cod-liver oil will be prevented for. an indefinite period from acquiring malflavor underthe different conditions encountered in transportation, storage, and use.

Application of the antioxidant-containing oilinsoluble film to the lip of the bottle will retardthe malodorization of such oil as may be left has been poured fromthe I Manifestly the specific details set forth are merely illustrative and by no means definitive of our invention, which may assume various embodiments within the scope of the appended. claims.

We claim:

1; A package comprising an edible oil in an opaque, glass container ,interiorlycoated with an oil-insoluble film containing an antioxidant.

2. A package comprising an edible oil in a glass container coated exteriorly with an oilinsoluble film .containing an opaque substance and interiorly with an oil-insoluble film containing an antioxidant.

3. A-package comprising cod-liver oil in an opaque glass containerinteriorly coated with an oil-insoluble film containing an antioxidant.

4. A package comprising cod-liver oil in a glass container coated exteriorly with an oil-insoluble film containing an opaque substance and interiorly with an oil-insoluble film containing an antioxidant. 11

WALTER oi. CHFtIS'IfIANSEN. FRANCIS R. CHAPPELL.

aminophenols, aromatic amines, and derivatives thereof, for example hydroquinone, p-amino- 60 phenol, diphenylamine, and phenylu-naphthyI- 

